I stumbled across a Nike, Puma, and 3 or 4 other outlet sports stores all next to each in Kwun Tong the other day. Its in a weird industrial building in Kwun Tong (close to MTR and APM shopping mall) with old ladies standing outside handing out flyers and trying to push you into the various shops.
It's called Camel Paint Building. Kwun Tong MTR Exit B1, walk South.